The endless contest for northern Greece (6)
I believe the answer is:
thrace
'northern greece' is the definition.
The answer and definition can be both locations as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'the endless contest' is the wordplay.
'endless' means to remove the last letter.
'contest' becomes 'race' (race is a kind of contest).
'the' with its last letter taken off is 'th'.
'th'+'race'='THRACE'
'for' is the link.
Can you help me to learn more?
(Other definitions for thrace that I've seen before include "Ancient region now in Greece and Bulgaria" , "ancient land" , "old part of Europe" , "The car (anag.); historical region" , "Ancient Balkan region" .)